Rambus and Cadence Collaborate and Deliver Fully Integrated and Independently Verified PCI Express Solutions

Rambus Inc. (NASDAQ:RMBS), one of the world's premier technology
licensing companies specializing in high-speed chip architectures, and
Cadence(R) Design Systems, Inc. (NASDAQ:CDNS), the leader in global
electronic-design innovation, today announced fully integrated and
independently verified PCI Express(R) solutions. The two companies
have collaborated and now offer highly adaptable PCI Express digital
cores and PHY IP from Rambus, tightly integrated and verified with
Cadence verification IP.

The result of the joint work provides SOC designers with an
independently verified solution that seamlessly integrates Rambus'
design IP with the automated verification IP from Cadence. This
solution helps shorten time to market with an efficient, predictable,
and low-risk SOC design and verification to enhance the quality of the
end product. In addition, the solution includes the Cadence Compliance
Management System (CMS) featuring a PCI Express compliance
verification plan (vPlan) and compliance tests, both of which have
been specifically customized to the Rambus design IP. The CMS provides
an automated plan and metric-driven solution to reach high levels of
coverage without the need to develop tests. Based on the Cadence
Incisive(R) Plan-to-Closure methodology, the offering allows customers
to maximize design quality while minimizing protocol expertise and
verification time.

"As a company developing cutting-edge technology, it is critical
that we build our solutions on proven, tightly integrated technology,"
said John F. Brown, vice president, Engineering at Tilera Corporation.
"Using the combination of the Rambus configurable PCI Express Digital
Controller with the independently developed verification IP from
Cadence enables the rapid and successful IP integration we are looking
for."

"Through this collaboration, we are able to provide an ideal
combination of Cadence verification IP and methodology expertise with
Rambus design IP. This solution leverages the strengths of both
companies, speeding up the IP integration process and increasing
productivity and quality for customers," said Steve Glaser, vice
president of Marketing at Cadence's Verification Division. "Designers
will gain a higher degree of predictability with the functional
coverage provided by the Rambus design-IP-specific CMS. The result
gives our mutual customers confidence that they will get to market on
schedule with a quality product."

The PCI-SIG-compliant and interoperability-tested Rambus PCI
Express solution has been implemented and shipped in numerous
high-volume applications. Rambus digital core IP has adaptable
application interfaces that minimize the amount of glue logic required
for integration. Rambus PHY cells are delivered as complete serial
communication cells, optimized for maximum production yield.

"Increasingly powerful computing and consumer electronics
applications require IP solutions that are flexible and seamlessly
integrate into our customers' designs," said Tim Messegee, vice
president of Marketing at Rambus Inc. "With this collaboration,
Cadence and Rambus continue our commitment to provide the market with
superior integrated IP and EDA solutions that accelerate time to
market and reduce design risk."

About Rambus Inc.

Rambus is one of the world's premier technology licensing
companies specializing in the invention and design of high-speed chip
architectures. Since its founding in 1990, the Company's patented
innovations, breakthrough technologies and renowned integration
expertise have helped industry-leading chip and system companies bring
superior products to market. Rambus' technology and products solve
customers' most complex chip and system-level interface challenges
enabling unprecedented performance in computing, communications and
consumer electronics applications. Rambus licenses both its
world-class patent portfolio as well as its family of leadership and
industry-standard interface products. Headquartered in Los Altos,
California, Rambus has regional offices in North Carolina, India,
Germany, Japan, Korea and Taiwan. Additional information is available
at www.rambus.com.

About Cadence

Cadence enables global electronic-design innovation and plays an
essential role in the creation of today's integrated circuits and
electronics. Customers use Cadence software and hardware,
methodologies, and services to design and verify advanced
semiconductors, consumer electronics, networking and
telecommunications equipment, and computer systems. Cadence reported
2006 revenues of approximately $1.5 billion, and has approximately
5,200 employees. The company is headquartered in San Jose, Calif.,
with sales offices, design centers, and research facilities around the
world to serve the global electronics industry. More information about
the company, its products, and services is available at
www.cadence.com.

PCI Express and PCI-SIG are registered trademarks of the PCI
Express Special Interest Group. The PCI-SIG is the special interest
group that owns and manages PCI specifications as open industry
standards.

Rambus and the Rambus logo are registered trademarks of Rambus
Inc. All other trade names are the service marks, trademarks, or
registered trademarks of their respective owners.

Cadence is a registered trademark and the Cadence logo is a
trademark of Cadence Design Systems, Inc. in the U.S. and other
countries. All other trademarks are the property of their respective
owners.